Detection device and measuring apparatus

Abstract

A detection device that includes a light emitting part that outputs coherent light, a first light receiving part that generates the first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through an artery of the measurement site, and a second light receiving part that generates the second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the artery, wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line, and are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between.

What is claimed is: 
     
       1. A detection device that generates a first detection signal and a second detection signal used for specification of biological information on blood flow of a measurement site, comprising:
 a light emitting part that outputs coherent light; 
 a first light receiving part that generates the first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through an artery of the measurement site; and 
 a second light receiving part that generates the second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the artery, 
 wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line, and the first light receiving part and the second light receiving part are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between. 
 
     
     
       2. The detection device according to  claim 1 , wherein the first light receiving part and the second light receiving part are located at a distance from 0.5 mm to 3 mm from the light emitting part. 
     
     
       3. The detection device according to  claim 1 , wherein the first light receiving part and the second light receiving part are located at a distance from 1 mm to 1.5 mm from the light emitting part. 
     
     
       4. A detection device that generates detection signals used for specification of biological information on blood flow of a measurement site comprising a plurality of detection parts,
 each of the plurality of detection parts includes: 
 a light emitting part that outputs coherent light; 
 a first light receiving part that generates a first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through the measurement site; and 
 a second light receiving part that generates a second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the measurement site, 
 wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line, and the first light receiving part and the second light receiving part are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between, and 
 of the plurality of detection parts, a straight line connecting the first light receiving part and the second light receiving part of one detection part and a straight line connecting the first light receiving part and the second light receiving part of the other detection part are parallel to each other on the detection surface. 
 
     
     
       5. A measuring apparatus that specifies biological information on blood flow of a measurement site, comprising:
 a light emitting part that outputs coherent light to the measurement site; 
 a first light receiving part that generates a first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through an artery of the measurement site; 
 a second light receiving part that generates a second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the artery; and 
 a specification part that specifies the biological information from the first detection signal and the second detection signal, 
 wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line, and the first light receiving part and the second light receiving part are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between. 
 
     
     
       6. A measuring apparatus that specifies biological information on blood flow of a measurement site, comprising:
 a belt for attaching the measuring apparatus to the measurement site; 
 a light emitting part that outputs coherent light to the measurement site; 
 a first light receiving part that generates a first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through an artery of the measurement site; 
 a second light receiving part that generates a second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the artery; and 
 a specification part that specifies the biological information from the first detection signal and the second detection signal, 
 wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line along a width direction of the belt, and the first light receiving part and the second light receiving part are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between.